The Collaborative International Dictionary of English v.0.48:

Line-up \Line"-up`\, Lineup \Line"up`\ (l[imac]n"[u^]p), n.
   1. The members of a team who are scheduled to play a game.
      [PJC]

   2. Specifically: The formation of football players before the
      start or a restart of play.
      [PJC]

   3. Specifically: (baseball) a list of batters in the order in
      which they will bat. [WordNet sense 1]

   Syn: batting order, card, lineup.
        [WordNet 1.5]

   4. Hence: any arrangement of persons (rarely, of things),
      esp. when having a common purpose or sentiment; as, the
      line-up at a ticket-office window; the line-up of
      political factions. [Colloq.]
      [PJC]

   5. A group of persons including a suspect in a police
      investigation, arranged so as to be observed by a witness,
      who is requested to identify the perpetrator, if he/she is
      present in the group. Such an identification may be used
      as evidence of guilt of the suspect. Also called a police
      lineup. [WordNet sense 2]
      [PJC]

WordNet (r) 3.0 (2006):

lineup
    n 1: (baseball) a list of batters in the order in which they
         will bat; "the managers presented their cards to the umpire
         at home plate" [syn: batting order, card, lineup]
    2: a line of persons arranged by police for inspection or
       identification

Moby Thesaurus II by Grady Ward, 1.0:

116 Moby Thesaurus words for "lineup":
   agenda, approach, arrangement, array, attack, batting order,
   beadroll, bill, bill of fare, blueprint, blueprinting, budget,
   cadastre, calculation, calendar, card, carte du jour, census,
   census report, charting, checklist, checkroll, conception, concord,
   contrivance, deployment, design, device, disposal, disposition,
   docket, dramatis personae, enterprise, envisagement, figuring,
   foresight, forethought, formation, game, graphing, ground plan,
   guidelines, harmony, head count, honor roll, idea, intention,
   jury list, jury panel, layout, list of agenda, long-range plan,
   mapping, marshaling, master plan, menu, method, methodology,
   muster, muster roll, nose count, operations research, order,
   order of business, organization, peace, plan, planning,
   planning function, playbill, poll, prearrangement, procedure,
   program, program of action, program of operation, programma,
   property roll, proportion, prospectus, protocol, questionnaire,
   quiet, quietude, rationalization, regularity, returns, roll,
   roll call, roster, rota, routine, schedule, schema, schematism,
   schematization, scheme, scheme of arrangement, scroll, setup,
   slate, strategic plan, strategy, structure, symmetry, system,
   systematization, tactical plan, tactics, tax roll, the big picture,
   the picture, tranquillity, uniformity, way, working plan